The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 1991
Filed:
Feb. 02, 1989
Applicant:
Inventors:
Richard A Cayless, Maidenhead, GB;
Leonard B Hazell, Burpham, GB;
Assignee:
The British Petroleum Company p.l.c., London, GB;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
156281 ; 156319 ; 427343 ; 428469 ; 428629 ;
Abstract
The naturally occurring metal oxide layer in contact with a metal in the bulk state is treated with a solution of a salt of yttrium or the lanthanide metals. The treatment is applied in order to increase the adhesive strength of bonds between the metal and subsequently applied adhesives and to enhance the durability of such bonds in aqueous environments. The concentration of the applied solution is preferably in the range 10.sup.-2 to 10.sup.-6 M. Yttrium or samarium nitrate is the preferred salt. The treatment is preferably used in conjunction with epoxy resin adhesives.